/*
 * 太原学院计算机科学与技术系 (c) 版权所有
 */
package cn.edu.tyu.finance.thingstype.servlet;

import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.edu.tyu.util.DbUtil;
import cn.edu.tyu.util.StringUtil;

/**
 * Servlet implementation class loginServlet
 */
@WebServlet("/loginServlet")
public class loginServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public loginServlet() {
        super();
        // TODO Auto-generated constructor stub
    }
    /**
	 * 处理网页发来的get请求
	 * @param request 请求对象
	 * @param respons 响应对象
	 */
    @Override
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		//1.接受用户名和密码
		String uname=request.getParameter("username");
		String upsw=request.getParameter("userpsw");
		String upswMd5=StringUtil.getMD5(upsw);
		//2.连接数据库，查询有无此人
		Connection conn=null;
		PreparedStatement pstmt=null;
		ResultSet rs=null;
		conn=DbUtil.getConnection();
		String sql="SELECT * FROM users WHERE username=? AND userpsw=?";
		try {
			pstmt=conn.prepareStatement(sql);
			pstmt.setString(1, uname);
			pstmt.setString(2, upswMd5);
			rs=pstmt.executeQuery();
			if (rs.next()) {
				response.sendRedirect("ok.jsp");
			}else {
				response.sendRedirect("fail.jsp");
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			DbUtil.backConn(conn, pstmt, rs);
		}
	}
	/**
	 * 处理网页发来的post请求
	 * @param request 请求对象
	 * @param respons 响应对象
	 */
    @Override
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}
